This option was developed some time ago because drivers had an issue with the channel. Aircrack-ng tools would simply ignore invalid channel when used.
Nowadays, it does not happen anymore, except when network managers, supplicants, etc are playing with the card (which is not a good reason to keep it, anything messing with the card should be killed using
airmon-ng check kill/taken care of).
If you have a good reason why it should stay, please update
this ticket.
